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3D-Printed Titanium Implants with Bioactive Peptide-Polysaccharide Scaffolds for Personalized Bone Reconstruction.

Noam Rattner1,2,3, Vladimir Perlis1,2,3, Eran Golden4

  • 1Department of Oral Biology, Goldschleger School of Dental Medicine, Gray Faculty of Medical and Health Sciences, Tel Aviv University, Tel Aviv, Israel.

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Summary

This study introduces a novel bioactive scaffold for 3D-printed titanium implants, significantly improving bone integration in large bone defects. The cell-free approach enhances osseointegration and bone regeneration for personalized skeletal repair.

Keywords:
3D‐printed implantsbone regenerationcritical‐size bone defect modelhydrogelscaffold

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Orthopedic Surgery

Background:

  • Large bone defects pose significant clinical challenges, often requiring implants.
  • Standard titanium implants, while strong, exhibit poor osseointegration due to bioinert surfaces.
  • 3D-printed titanium offers patient-specific designs but lacks sufficient bioactivity for core bone integration.

Purpose of the Study:

  • To develop a bioactive, cell-free strategy to enhance osseointegration in porous titanium implants.
  • To evaluate the efficacy of a peptide-hyaluronic acid scaffold integrated with titanium implants in a bone defect model.

Main Methods:

  • Integration of porous titanium implants with a nanofibrillar peptide-hyaluronic acid scaffold (hydrogel or lyophilized).
  • In vitro assessment of scaffold enzymatic stability and osteoblast adhesion.
  • In vivo evaluation in a rabbit calvarial critical-size bone defect model.

Main Results:

  • Scaffold integration significantly improved bone-implant contact and inner bone volume compared to controls.
  • Hydrogel-integrated implants nearly doubled inner bone volume and enhanced trabecular architecture.
  • Histology confirmed reduced inflammation and enhanced bone regeneration with the bioactive scaffold.

Conclusions:

  • A cell-free, growth-factor-free strategy combining titanium implants with ECM-mimicking scaffolds promotes robust bone regeneration.
  • This approach offers a translatable pathway for patient-specific skeletal repair by enhancing osseointegration.
  • The peptide-hyaluronic acid scaffold effectively bridges the gap between structural implant properties and biological bone healing needs.